Table 1 Evoked potential score of thoracic spinal cord injury in nonhuman primates.

TES-MEPs
	No TES-MEPs		Yes, but Amplitude decreased over 50%; or latency increase over 10%		Normal OR Amplitude decreased below 50% and latency increase below 10%
Target muscles	Left	Right	Left	Right	Left	Right
Abductor Pollicis Brevis	0	0	2	2	4	4
Quadriceps Femoris	0	0	2	2	4	4
Musculi Hippicus	0	0	2	2	4	4
Extensor Hallucis Longus	0	0	2	2	4	4
Abductor Hallucis	0	0	2	2	4	4
Total
SSEPs
	No SSEPs		Yes, but Amplitude decreased over 50%; or latency increase over 10%		Normal OR Amplitude decreased below 50% and latency increase below 10%
Target nerves	Left	Right	Left	Right	Left	Right
Bilateral median N	0	0	1	1	2	2
Bilateral median N	0	0	1	1	2	2
T3	0	0	1	1	2	2
T4	0	0	1	1	2	2
T5	0	0	1	1	2	2
T6	0	0	1	1	2	2
T7	0	0	1	1	2	2
T8	0	0	1	1	2	2
T9	0	0	1	1	2	2
T10	0	0	1	1	2	2
T11	0	0	1	1	2	2
T12	0	0	1	1	2	2
Femoral N	0	0	1	1	2	2
Tibial N	0	0	1	1	2	2
Nommon Peroneal N	0	0	1	1	2	2
Total

The EP-based scoring system contained two components, the TES-MEPs and SSEPs. The total EP score was 100 points, including 40% of TES-MEPs and 60% of SSEPs. A total of 10 bilateral muscles were included in the scoring of TES-MEPs. The SSEPs and TES-MEPs scores before and after SCI were compared to evaluate the neural function of nonhuman primates. Contrast with the initial EP scores before SCI, the changes of EP scores after SCI were divided into three levels: ① 0 point when no EP was recorded; ② when SSEPs was recorded, but the amplitude decreased over 50% or the latency increased over 10% compared to base data,1 point of SSEPs was got; when TES-MEPs was recorded, but the amplitude decreased over 80% or the latency increased over 10% compared to base data, 2 point of TES-MEPs was got; ③ when SSEPs was recorded, the amplitude was higher/normal/decreased less than 50%, or the latency was shorten/normal/prolonged less than 10% compared to base data, 2 point of SSEPs was got; when TES-MEPs was recorded, the amplitude was higher/normal/decreased less than 80%, or the latency was shorten/normal/prolonged less than 10% compared to base data,4 point of TES-MEPs was got. If the amplitude and latency of EP of upper limbs were significantly changed, then we recommend ratio of lower extremity potential and upper extremity potential as evaluation criteria.

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